Tolong dijawab kak..

SMP/MTK/UN*m
Jawaban:
23. 2x+15 + 4x+9=180
6x+24=180
6x=180-24
6x=156
x =156/6
x =26
Penyiku PQR= 90- =90- 2x26+15
=90-52+15
=90-67
=23 (A)
24. = 70 o (B)